Desmid of the month
May 2018

Cosmarium pachydermum

Cosmarium pachydermum is characterized by large, smooth-walled cells
that are oblong-elliptic in outline with a moderately deep median constriction. Cell wall is rather thick and provided with distinct, densily set pores. In the Netherlands, C. pachydermum is a rather rare species in slightly acidic, mesotrophic habitats, in particular quaking fen hollows.